Where I live, masks are mandatory everywhere and if you don't wear one you get fined a ton of money. Only in EU and US that debate on the usefulness of masks exists.
It comes from the CDC and WHO who claims that there is no proof masks are efficient and by proof they mean "valid studies". The problem is, it's not ethic to ask people to not wear a mask and expose them to a disease, consequently, you cannot have valid studies with a control group, just a bunch of statistics.
It's like testing if parachutes are efficient to prevent death in case you fall off a plane. It's not ethical to have a group of people not wearing a parachute and count how many of them died compared to the one who were wearing a parachute.
Common sense tells us to wear a parachute when we jump off a plane. Same thing with masks. They are a barrier that prevent water droplets to enter your mouth and nose so they obviously lower the chance to prevent contracting a disease.
In Asia, everybody wear a mask in public space, there is no question asked. If you don't, people stay away from you. At first I thought they were crazy but you have to remember that they already had some pretty bad experiences with SARS and MERS. That's also the reason why they knew what to do and prevented many deaths, and arrogant politicians in US and EU didn't take notes and learn anything. Sad story.
It comes from the CDC and WHO who claims that there is no proof masks are efficient and by proof they mean "valid studies". The problem is, it's not ethic to ask people to not wear a mask and expose them to a disease, consequently, you cannot have valid studies with a control group, just a bunch of statistics.
It's like testing if parachutes are efficient to prevent death in case you fall off a plane. It's not ethical to have a group of people not wearing a parachute and count how many of them died compared to the one who were wearing a parachute.
Common sense tells us to wear a parachute when we jump off a plane. Same thing with masks. They are a barrier that prevent water droplets to enter your mouth and nose so they obviously lower the chance to prevent contracting a disease.
In Asia, everybody wear a mask in public space, there is no question asked. If you don't, people stay away from you. At first I thought they were crazy but you have to remember that they already had some pretty bad experiences with SARS and MERS. That's also the reason why they knew what to do and prevented many deaths, and arrogant politicians in US and EU didn't take notes and learn anything. Sad story.